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path: root/drivers/watchdog/mpc5200_wdt.c
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Diffstat (limited to 'drivers/watchdog/mpc5200_wdt.c')
-rw-r--r--drivers/watchdog/mpc5200_wdt.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/watchdog/mpc5200_wdt.c b/drivers/watchdog/mpc5200_wdt.c
index 77c1c2ae2cc2..db91892558f2 100644
--- a/drivers/watchdog/mpc5200_wdt.c
+++ b/drivers/watchdog/mpc5200_wdt.c
@@ -5,7 +5,7 @@
5#include <linux/io.h> 5#include <linux/io.h>
6#include <linux/spinlock.h> 6#include <linux/spinlock.h>
7#include <linux/of_platform.h> 7#include <linux/of_platform.h>
8#include <asm/uaccess.h> 8#include <linux/uaccess.h>
9#include <asm/mpc52xx.h> 9#include <asm/mpc52xx.h>
10 10
11 11
@@ -57,7 +57,8 @@ static int mpc5200_wdt_start(struct mpc5200_wdt *wdt)
57 /* set timeout, with maximum prescaler */ 57 /* set timeout, with maximum prescaler */
58 out_be32(&wdt->regs->count, 0x0 | wdt->count); 58 out_be32(&wdt->regs->count, 0x0 | wdt->count);
59 /* enable watchdog */ 59 /* enable watchdog */
60 out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT | GPT_MODE_MS_TIMER); 60 out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT |
61 GPT_MODE_MS_TIMER);
61 spin_unlock(&wdt->io_lock); 62 spin_unlock(&wdt->io_lock);
62 63
63 return 0; 64 return 0;
@@ -66,7 +67,8 @@ static int mpc5200_wdt_ping(struct mpc5200_wdt *wdt)
66{ 67{
67 spin_lock(&wdt->io_lock); 68 spin_lock(&wdt->io_lock);
68 /* writing A5 to OCPW resets the watchdog */ 69 /* writing A5 to OCPW resets the watchdog */
69 out_be32(&wdt->regs->mode, 0xA5000000 | (0xffffff & in_be32(&wdt->regs->mode))); 70 out_be32(&wdt->regs->mode, 0xA5000000 |
71 (0xffffff & in_be32(&wdt->regs->mode)));
70 spin_unlock(&wdt->io_lock); 72 spin_unlock(&wdt->io_lock);
71 return 0; 73 return 0;
72} 74}
@@ -92,8 +94,8 @@ static struct watchdog_info mpc5200_wdt_info = {
92 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, 94 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
93 .identity = "mpc5200 watchdog on GPT0", 95 .identity = "mpc5200 watchdog on GPT0",
94}; 96};
95static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file, 97static long mpc5200_wdt_ioctl(struct file *file, unsigned int cmd,
96 unsigned int cmd, unsigned long arg) 98 unsigned long arg)
97{ 99{
98 struct mpc5200_wdt *wdt = file->private_data; 100 struct mpc5200_wdt *wdt = file->private_data;
99 int __user *data = (int __user *)arg; 101 int __user *data = (int __user *)arg;
@@ -103,7 +105,7 @@ static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
103 switch (cmd) { 105 switch (cmd) {
104 case WDIOC_GETSUPPORT: 106 case WDIOC_GETSUPPORT:
105 ret = copy_to_user(data, &mpc5200_wdt_info, 107 ret = copy_to_user(data, &mpc5200_wdt_info,
106 sizeof(mpc5200_wdt_info)); 108 sizeof(mpc5200_wdt_info));
107 if (ret) 109 if (ret)
108 ret = -EFAULT; 110 ret = -EFAULT;
109 break; 111 break;
@@ -135,6 +137,7 @@ static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
135 } 137 }
136 return ret; 138 return ret;
137} 139}
140
138static int mpc5200_wdt_open(struct inode *inode, struct file *file) 141static int mpc5200_wdt_open(struct inode *inode, struct file *file)
139{ 142{
140 /* /dev/watchdog can only be opened once */ 143 /* /dev/watchdog can only be opened once */
@@ -161,13 +164,14 @@ static int mpc5200_wdt_release(struct inode *inode, struct file *file)
161static const struct file_operations mpc5200_wdt_fops = { 164static const struct file_operations mpc5200_wdt_fops = {
162 .owner = THIS_MODULE, 165 .owner = THIS_MODULE,
163 .write = mpc5200_wdt_write, 166 .write = mpc5200_wdt_write,
164 .ioctl = mpc5200_wdt_ioctl, 167 .unlocked_ioctl = mpc5200_wdt_ioctl,
165 .open = mpc5200_wdt_open, 168 .open = mpc5200_wdt_open,
166 .release = mpc5200_wdt_release, 169 .release = mpc5200_wdt_release,
167}; 170};
168 171
169/* module operations */ 172/* module operations */
170static int mpc5200_wdt_probe(struct of_device *op, const struct of_device_id *match) 173static int mpc5200_wdt_probe(struct of_device *op,
174 const struct of_device_id *match)
171{ 175{
172 struct mpc5200_wdt *wdt; 176 struct mpc5200_wdt *wdt;
173 int err; 177 int err;
@@ -215,9 +219,9 @@ static int mpc5200_wdt_probe(struct of_device *op, const struct of_device_id *ma
215 return 0; 219 return 0;
216 220
217 iounmap(wdt->regs); 221 iounmap(wdt->regs);
218 out_release: 222out_release:
219 release_mem_region(wdt->mem.start, size); 223 release_mem_region(wdt->mem.start, size);
220 out_free: 224out_free:
221 kfree(wdt); 225 kfree(wdt);
222 return err; 226 return err;
223} 227}